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United States Patent | 5,747,969 |
Tamai | May 5, 1998 |
The charging method repeatedly charges and suspends charging to pulse charge a rechargeable battery. Charging is suspended only after a given amount of charge is transferred to the battery. Battery voltage is measured during the period of suspended charging, and charging is resumed only after the voltage of the battery drops below a first prescribed voltage. This situation is continuously repeated to pulse charge a rechargeable battery.
Inventors: | Tamai; Mikitaka (Sumoto, JP) |
Assignee: | Sanyo Electric Co., Ltd. (Osaka, JP) |
Appl. No.: | 748631 |
Filed: | November 13, 1996 |
Nov 21, 1995[JP] | 7-302950 |
Current U.S. Class: | 320/141; 320/145 |
Intern'l Class: | H01M 010/44; H01M 010/46 |
Field of Search: | 320/21,22,23,30,31,32,39,40,35,37 |
5367244 | Nov., 1994 | Rose et al. | 320/23. |
5442274 | Aug., 1995 | Tamai | 320/23. |
5606240 | Feb., 1997 | Kokuga et al. | 320/32. |
5617007 | Apr., 1997 | Keidl et al. | 320/22. |
Foreign Patent Documents | |||
2-119539 | May., 1990 | JP. | |
6-113474 | Apr., 1994 | JP. |